Finding the Fourth Proportional to 12,864,479.14, 17,761,289.34 and 7,974,926.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,864,479.14 : 17,761,289.34 = 7,974,926.56 : x
2. Step 2: Convert to fraction form
   12,864,479.14/17,761,289.34 = 7,974,926.56/x
3. Step 3: Cross multiply
   12,864,479.14x = 17,761,289.34 × 7,974,926.56
4. Step 4: Simplify right side
   12,864,479.14x = 141,644,978,097,410.88
5. Step 5: Solve for x
   x = 141,644,978,097,410.88/12,864,479.14
6. Step 6: Final answer
   x = 11,010,549.01